Pixelart style render in blender
You might want to have a look at this: http://www.blendswap.com/blends/view/65505
or this: http://www.blendswap.com/blends/view/44982

They are both using Freestyle for the lines, and Eight_Bit blending has no anti-aliasing. But you can find all that out with a look at the .blend files.